6. Iridium is a radioactive elementused fortherapy in nucle armedicine. It decaysto% or 24, of its original mass after 74 days. After 148 days, it decaysto %, or 2?, of its original mass. a) What fraction remains after 222 days? write fraction as apowerof 2 with a negative exponentalso. bị What fraction remains after 370 days? Write fraction as apower of 2 with a negative exponent also.

6. Iridium is a radioactive elementused fortherapy in nucle armedicine. It decaysto% or 24, of its original mass after 74 days. After 148 days, it decaysto %, or 2?, of its original mass. a) What fraction remains after 222 days? write fraction as apowerof 2 with a negative exponentalso. bị What fraction remains after 370 days? Write fraction as apower of 2 with a negative exponent also.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.

Question

6. Iridium is a radioactive elementused fortherapy in nucle arme dicine. It decaysto% or
21, of its original mass after 74 days. After148 days, it de caysto %, or 2:2, of its original
mass.
a) what fraction remains after 222 days? Write fraction as a powerof 2 with a ne gative
exponentalso.
b) What fraction remains after 370 days? Write fraction as a powerof 2 with a ne gative
exponentalso.

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